Tailor&#39;s chalk-sharpener.



W. J. KELLY.

TAILORS CHALK SHARPENER.

APPLICATION FILED JULY 17, 1911. 1,05 ,0 9 Y Patented Mar 18, 1913 2 SHEETS-SHEET 1 1 *Ql v wo'mwu COLUMBIA PLANOGRAPH c0. WASHINGTUN. D. c.

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TAILORS CHALK SHARPENER.

APPLIOATION FILED JULY 17, 1911..

1,056,029, V Patented Mar. 18, 1913.

2 SHEETSSHEET 2.

WILLIAM J. KELLY, OF DENVER, COLORADO.

TAILOR/S CHALK-SHARPENER.

Specification of Letters Patent.

Patented Mar. 18, 1913.

Application filed July 17, 1911. Serial No. 638,954.

To all whom it may concern:

Be it known that I, WILLIAM J. KELLY, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Tailors Chalk-Sharpeners; and I do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in devices for sharpening the flat pieces of chalk used by tailors in marking the goods with which they are working.

My improved device consists of a pair of sharpening rolls connected to be rotated in reverse directions, the rolls being separated and their sharpening surfaces being composed of screw-threads, the threaded surface of each roll consisting of a series of parallel threads, whereby these threads, while of considerable pitch, cover the entire surface of the roll. This makes it practicable to provide the rolls with a suitable grinding or cutting surface. The two rolls are each made of two different diameters, whereby they are separated a greater distance at one end of the device than at the other, whereby the chalk may be ground with an edge having more or less inclination, as may be desired.

The top of the device is equipped with an adjustable plate, slotted to permit the inser tion of the chalk into engagement wit-h the sharpening rolls. This plate is laterally adjustable, whereby the slots formed therein may be placed in direct alinement with the spaces between the rolls, or out of alinement therewith, as may be desired. If the slots are in alinement with the said spaces, the marking edge of the chalk is ground equally on both sides, while, if the slots are more or less out of lateral alinement with the spaces between the rolls, the chalk will be ground on one side with a more abrupt bevel than on the opposite side, since less surface of the piece of chalk is subjected to the ac tion of the sharpening rolls in one case than in the other.

Provision is made for mounting the de vice upon a wall or other suitable stationary support, whereby it is conveniently accessible for chalk-sharpening purposes.

A receptacle for receiving and retaining the chalk cuttings is inserted into the casing of the device from below, the same being composed of sheet metal and having yielding sides, which have sutlicient tension to automatically retain the device in place upon the casing or frame of the sharpener until it is removed by design for the purpose of emptying the cuttings.

IIELVlDg briefly outlined my improved construction, I will proceed to describe the same in detail, reference being made to the accom-. panying drawing, in which is illustrated an embodiment thereof.

In this drawing: Figure 1 may be considered a top plan view of the device, assuming that its supporting bracket is in the horizontal position, its base being secured to a vertical wall. Fig. 2 is a longitudinal section, taken through the casing, in which the rolls are j ournaled, the latter being shown in elevation. This is a view taken on the line 22 of Fig. 3, the base of the supporting bracket being broken away. Fig. 3 is a section, taken on the line 3-3 of Fig. 2, the base of the bracket being shown complete and in elevation. Fig. 4 is a fragmentary sectional view, illustrating the manner of connecting the roll frame with the bracket, the adjusting screw being in position to per mit the frame of the rolls to be separated from the toothed disk of the bracket for the purpose of adjusting the roll frame with reference to the bracket. Fig. 5 is an end view in detail of the receptacle for the chalk cuttings. Fig. 6 is a cross section, taken through one of the sharpening rolls. Fig. 7 is a detail View of a piece of chalk of the construction which my improved device is intended to sharpen. Fig. 8 is a section, taken on the line 88 of Fig. 7, the position of the chalk, with reference to the portions of the sharpening rolls of both diameters, being illustrated. Fig. 9 is a section, taken on the line 99 of Fig. 1, viewed in the direction of the arrow. In this view, the supporting bracket is secured to a horizontal, instead of a vertical, support, as in Fig. 1. This feature must be considered in reading Fig. 9 on Fig. 1. Fig. 10 is a longitudinal section, taken through the device on the line 1010 of Fig. 1. Fig. 11 is a detail view of the receptacle for the chalk cuttings.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a rectangular frame composed of side plates 6 and 7 As illustrated in the drawing, the plate 7 consists of two parts having members 8 extending at right angles to the part 7, the members 8 being separated by a block 9, the block being secured in place by screws 10, the openings for the screws being plain except in one of the members 8, where the opening 12 is threaded, thus making it practicable to clamp the block 9 between the members 8, the said block forming a spacer. The parts 8 are separated adjacent the block 9 to receive the toothed disk-shaped extremity 13 of a securing bracket 14. The thickness of the toothed disk 13 is such as to turn easily between the extensions 15 of the members 8 beyond the spacing block. The surface of the said block, adjacent the toothed disk of the bracket, is concave to harmonize with the curve of the bracket disk, as shown at 16, the teeth of the block being arranged to interlock with the toothed periphery of the disk 13 when the device is in position for use.

The frame of the device is connected with the bracket disk by a screw pin 17 of two different diameters 18 and 19. The part 15 of one member 8 has an opening 20 large enough to receive the larger part 1.9 of the screw pin, while the bracket disk has an opening 21 of corresponding size. The part 15 of the other member 8 has an opening 22, which is shaped to fit the relatively small or reduced part 18 of the screw pin, in which the latter fits closely, a nut 24 being applied to the protruding threaded extremity 23 of the screw to fasten the same in place. YVhen the larger diameter 19 of the screw 15 is in engagement with both openings 20 and 21, the bracket disk is interlocked with the toothed surface 16 of the spacing block, thus securely retaining'the device in position for use. The bracket 14 has a flanged base 25, provided with openings for fastening screws 26, which may be inserted in a stationary wall 27 or other suitable support.

The extremities of the two plate members 7, remote from the angle parts 9, are provided with parts 28 bent at right angles to the body parts of the plate 7, and extend in opposite directions from the members 8 of the said plate, the parts 28 closing the ends of the casing 5.

Applied to the inner surfaces of the ends 28 of the frame are bushing plates 29 equipped with openings 30, registering with openings 31 in the ends 28 of the frame. The sharpening rolls 32 are journaled in the openings of these bushing plates in the ends 28 of the frame, the rolls being reduced to form journals 33, as best illustrated in Fig. 2. The plate 6 of the frame is secured in place by screws 34 threaded into the bushing plates 29. Each sharpening roll 32 is composed of sections 35 and 36 of two different diameters, the sections or portions of corresponding diameter of the two rolls being adjacent each other in a lengthwise direction. As the axes of the two rolls are parallel, the roll portions 36 are separated by a space 37 of greater width than the space 38 between the roll portions 35 of larger diameter. By virtue of this construction and arrangement, the pieces of chalk 39, when inserted between the relatively small roll portions 36, pass farther inwardly, as illustrated in Fig. 8, in which the roll portions 36, are indicated by the upper dotted arcs and the roll portions 35 by the lower dotted arcs. This view illustrates the difference in the formation of the cutting edge of the chalkfwhen it is inserted in the spaces 37 and 38, respectively. The journals 33 at one extremity of each roll protrude beyond the frame and are provided with right and left screw-threaded extremities 40 and 41, upon which are threaded gears 42 and 43, the said gears meshingwith each other.

gear to receive a crank 44, having a hand piece 45 for operating the rolls. Since the gears 41 and 42 mesh with each other, the turning of the crank causes the rolls to rotate in opposite directions; hence, the necessity for the screw threaded extensions of the roll journals having right and left threads, respectively.

To the framework 5 is applied a top plate 46, the same being secured to the frame by screws 47 passed through elongated openings 48 in the bushing plates 29. This top plate is slotted, as shown at 49 and 50, in order to provide for the insertion of the chalk into operative relation with the cutting roll portions of diil'erent diameters. By adjusting the plate 46 laterally, the slots 49 and 50 may be thrown in either direction from vertical alinement with the spaces 37 and 38 between the chalk sharpening rolls, whereby the formation of the marking edge of the chalk may be varied at pleasure.

To the bottom of the frame, or to the side thereof, directly opposite the plate 46, is

The threaded journal extension 40 is extended beyond the j applied a receptacle 51 for receiving the chalk cuttings. This receptacle is provided with side extensions 52 which are normally bent outwardly slightly to form spring members, which, when applied to the frame, make the receptacle self-retaining. The receptacle is applied by pressing the spring sides inwardly sufficiently to allow the said sides to be inserted between the parallel side plates 6 and 7 of the frame. The ends 53 of the receptacle fit closely against the lower edges of the bushing plates 29, thus preventing the accidental escape of the chalk cuttings. The receptacle may be quickly and easily removed, when it is desired to empty the cuttings, by simply grasping it by its two opposite ends, which eX- tend below the ends of the frame, and pulling thereon, since only slight power is required to overcome the retaining tendency of the spring sides 52.

The fastening screws 47 for the top plate are threaded into the openings 54 communi eating with the roll journals, and consequently forming oil openings for lubricating the roller journals, it being only necessary to remove the fastening screws in order to oil the said journals.

From the foregoing description, the use and operation of my improved tailors chalk sharpener will be readily understood.

It is evident that the supporting bracket may be secured to either a vertical wall 27 or a horizontal plate or table 55,--(see Fig. 9), according to the desire of the user, or as circumstances may require.

The frame in which the rolls are journaled may be held at any desired angle in relation to the shank of the bracket 14;, that may be desired. This idea is illustrated by reference to Figs. 1 and 8, in which the frame is located between the same parallel planes as the shank of the bracket; while, in Fig. 9, this frame is located between planes extending at a considerable angle to the planes between which the bracket shank is located. The adjustment of the frame in which the sharpening rolls are journaled, with reference to the shank of the bracket may be readily accomplished by adjusting the screw pin to the position shown in Fig. 4c in the drawing, which makes it practicable to disconnect the teeth of the bracket disk 13 from the cooperating teeth of the spacing block 9. When this is done, the roll or frame may be turned upon the screw pin 19 to give the said frame any desired angle with reference to the shank of the bracket, after which the spacing block may be moved toward the teeth of the bracket disk, whereby the teeth of the two members are caused to interlock. The screw pin may then be moved into position whereby the bracket disk and spacing block are interlocked, thus maintaining the sharpening roll carrying frame in the desired position of adjustment.

In order to sharpen a piece of chalk 39, it is only necessary to pass it through one of the slots 49 or 50 of the top plate 46 of the device, whereby the marking edge of the chalk is passed between the portions 35 or 36 of the two sharpening rolls. Then, by turning the crank 44, so that the rolls shall move in the direction indicated by the arrows in Fig. 3, whereby the rolls have a tendency to force the chalk outwardly, the desired marking edge may be quickly formed upon the piece of chalk, as will be readily understood. If a relatively long beveled edge is required, the piece of chalk will be inserted between the sharpening roll portions 36 of less diameter, while, if a relatively short beveled edge is required, the chalk will be inserted between the roll portions 35.

Attention is called to the fact that the sharpening surface of bot-h roll portions 35 and 36 of each roll is formed of multiple screw threads, extending around the rolls in parallel relation, thus making it practicable to form the cut-ting surface of threads of con siderable pitch, and, at the same time, cover the entire surface of the rolls with the threads which are brought closely together. If a single screw thread only were employed to form this cutting surface and the thread was of the same pitch illustrated in the drawing, only a small portion of the surface of each roll would be occupied by the thread. However, by employing a multiplicity of threads,-say four, for instance,-the threads may be of considerable pitch, or comparatively coarse, individually considered, and, at the same time, cover the entire surface of the rolls. The screw-threaded roll surfaces are also knurled, or subjected to the action of a nurling tool during the rotation of the rolls, whereby the threads of the roll surfaces are slightly indented or toothed, in order to form a better cutting surface for chalk-sharpening purposes.

Having thus described my invention, what I claim is:

1. A device of the class described, comprising a frame, a pair of rolls arranged in parallel relation and journaled in the frame, the surface of the rolls being composed of a plurality of screw threads arranged in parallel relation, means for rotating the rolls, a plate applied to the frame above the rolls and having a relatively narrow slot in line with the adjacent surfaces of said rolls, to form a guide for the chalk during the sharpening operation.

2. A device of the class described, comprising a frame, a pair of sharpening rolls journaled in the frame, means for rotating the rolls, the surfaces of the rolls having the configuration of a multiplicity of screw threads, each of said threads being cut to parallel with the rolls to form a guide for 10 form saw teeth. the chalk.

3. A chalk sharpener comprising a frame, In testimony whereof I aflix my signature parallel rolls joprnaled in the frame and in presence of two witnesses.

5 havin their sur aces composed of a multi- Y plicitg of screw threads arranged in par- VILLIAM RELLX' allel relation, the threads being roughened, Vitnesses: and a top plate applied to the frame and lat- F. E. BOWEN, erally adjustable, the said plate being slotted C. E. BRADEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

